JP7048838B2 - Battery module and battery pack with busbar - Google Patents

Battery module and battery pack with busbar Download PDF

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JP7048838B2
JP7048838B2 JP2020524577A JP2020524577A JP7048838B2 JP 7048838 B2 JP7048838 B2 JP 7048838B2 JP 2020524577 A JP2020524577 A JP 2020524577A JP 2020524577 A JP2020524577 A JP 2020524577A JP 7048838 B2 JP7048838 B2 JP 7048838B2
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connection extension
extension portion
connection
battery module
bus bar
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JP2021501457A (en
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ジ－ス・パク
ソグ－ジン・ユン
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LG Energy Solution Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Description

本発明は、バスバーを備えたバッテリーモジュール及びこれを含むバッテリーパックに関し、より詳しくは、バスバーと円筒型電池セルの電極端子との溶接時、電流損失を減らして溶接性を向上させることができるバスバーを備えたバッテリーモジュール及びこれを含むバッテリーパックに関する。 The present invention relates to a battery module provided with a bus bar and a battery pack including the bus bar. More specifically, the present invention can reduce current loss and improve weldability when welding a bus bar and an electrode terminal of a cylindrical battery cell. With respect to a battery module equipped with and a battery pack containing the same.

本出願は、２０１８年６月１８日出願の韓国特許出願第１０－２０１８－００６９７０７号に基づく優先権を主張し、該当出願の明細書及び図面に開示された内容は、すべて本出願に組み込まれる。 This application claims priority based on Korean Patent Application No. 10-2018-0069707 filed on June 18, 2018, and all the contents disclosed in the specification and drawings of the relevant application are incorporated into this application. ..

最近、ノートブックＰＣ、ビデオカメラ、スマートフォーンなどのような携帯用電子製品の需要が急増し、電気自動車、エネルギー貯蔵用蓄電池、ロボット、衛星などの開発が本格化するにつれ、反復的な充放電が可能な高性能の二次電池についての研究が盛んでいる。 Recently, the demand for portable electronic products such as notebook PCs, camcorders, smart phones, etc. has increased rapidly, and as the development of electric vehicles, storage batteries for energy storage, robots, satellites, etc. has started in earnest, iterative charging and discharging There is a lot of research on high-performance secondary batteries that can be used.

現在、商用化した二次電池としては、ニッケルカドミウム電池、ニッケル水素電池、ニッケル亜鉛電池、リチウム二次電池などがあり、このうち、リチウム二次電池は、ニッケル系の二次電池に比べてメモリー効果がほとんど起こらず、充放電が自由で、自己放電率が非常に低くてエネルギー密度が高いなどの長所から脚光を浴びている。 Currently, commercialized secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, lithium secondary batteries, etc. Among them, lithium secondary batteries have more memory than nickel-based secondary batteries. It is in the limelight because of its advantages such as almost no effect, free charging and discharging, very low self-discharge rate, and high energy density.

このようなリチウム二次電池は、主にリチウム系酸化物及び炭素材をそれぞれ正極活物質及び負極活物質として用いる。リチウム二次電池は、このような正極活物質及び負極活物質がそれぞれ塗布された正極板及び負極板がセパレータを介して配置された電極組立体と、電極組立体を電解液とともに封止収納する外装材、即ち、電池ケースと、を備える。 Such a lithium secondary battery mainly uses a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. The lithium secondary battery encloses and stores the electrode assembly in which the positive electrode plate and the negative electrode plate coated with the positive electrode active material and the negative electrode active material are arranged via the separator, and the electrode assembly together with the electrolytic solution. It includes an exterior material, that is, a battery case.

一般に、リチウム二次電池は、外装材の形状によって、電極組立体が金属缶に収納されている缶型二次電池と、電極組立体がアルミニウムラミネートシートのパウチに収納されているパウチ型二次電池とに分けることができる。 Generally, lithium secondary batteries are a can-type secondary battery in which the electrode assembly is housed in a metal can and a pouch-type secondary battery in which the electrode assembly is housed in a pouch of an aluminum laminated sheet, depending on the shape of the exterior material. It can be divided into batteries.

このうち、缶型二次電池は、電極組立体が内蔵される金属缶を円筒状に製作する場合がある。このような缶型二次電池は、複数の二次電池を収容するハウジングと、複数の二次電池を電気的に接続するように構成されたバスバーと、を備えたバッテリーモジュールを構成するのに用いられ得る。 Of these, in the can-type secondary battery, a metal can in which the electrode assembly is incorporated may be manufactured in a cylindrical shape. Such a can-type secondary battery constitutes a battery module including a housing containing a plurality of secondary batteries and a bus bar configured to electrically connect the plurality of secondary batteries. Can be used.

最近、このようなバッテリーモジュールに備えられるバスバーは、電極端子との抵抗溶接の溶接性を高めるために、電気抵抗が多少高い素材を使う場合がある。 Recently, the bus bar provided in such a battery module may use a material having a slightly higher electric resistance in order to improve the weldability of resistance welding with the electrode terminal.

しかし、このようなバスバーは、二次電池で生成された電流を外部のデバイスにまで伝達するに際し、電流損失を大きくする要素となり得、エネルギー効率を阻害する恐れがある。また、電気抵抗が高い素材であるほどに熱伝導度が低下し、このようなバスバーが適用されたバッテリーモジュールの放熱性能を低下させる原因になり得る。 However, such a bus bar can be a factor that increases the current loss when transmitting the current generated by the secondary battery to an external device, and may hinder energy efficiency. Further, the higher the electric resistance of the material, the lower the thermal conductivity, which may cause the heat dissipation performance of the battery module to which such a bus bar is applied to be lowered.

逆に、電気抵抗が低い素材のバスバーを使う場合、抵抗溶接を用いて電極端子とバスバーとを接合するとき、抵抗熱を充分生じさせにくいため、溶接性が劣り、溶接作業時間が長くなるという問題があった。これによって、製造コストが上昇し、バッテリーモジュールの耐久性が劣るなどの問題が発生していた。 On the contrary, when a bus bar made of a material with low electrical resistance is used, when the electrode terminal and the bus bar are joined by resistance welding, it is difficult to generate sufficient resistance heat, so that the weldability is inferior and the welding work time becomes long. There was a problem. This has caused problems such as an increase in manufacturing cost and inferior durability of the battery module.

本発明は、上記問題点に鑑みてなされたものであり、バスバーと円筒型電池セルの電極端子との溶接時、電流損失を減らして溶接性を向上させることができるバスバーを備えたバッテリーモジュール及びこれを含むバッテリーパックを提供することを目的とする。 The present invention has been made in view of the above problems, and is a battery module provided with a bus bar capable of reducing current loss and improving weldability when welding a bus bar and an electrode terminal of a cylindrical battery cell. It is intended to provide a battery pack containing this.

本発明の他の目的及び長所は、下記する説明によって理解でき、本発明の実施例によってより明らかに分かるであろう。また、本発明の目的及び長所は、特許請求の範囲に示される手段及びその組合せによって実現することができる。 Other objects and advantages of the invention can be understood by the description below and will be more apparent by the examples of the invention. In addition, the objects and advantages of the present invention can be realized by means and combinations thereof shown in the claims.

上記の課題を達成するため、本発明によるバッテリーモジュールは、
電極端子が上部及び下部に各々形成され、水平方向に配置された複数の円筒型電池セルと、
前記複数の円筒型電池セルを挿入して収容するように収容部が備えられたモジュールハウジングと、
前記複数の円筒型電池セルの電極端子と接触して前記複数の円筒型電池セル同士を電気的に接続するように構成され、前記複数の円筒型電池セルの上部または下部に位置し、水平方向へ扁平なプレート形状を有し、前記プレート形状に上下方向へ穿孔された少なくとも一つ以上の接続開口が形成された本体部と、前記接続開口の内側縁部から相異なる水平方向へ突出して延び、端部が前記複数の円筒型電池セルのうちいずれか一つの電極端子と電気的に接続固定された第１接続延長部及び第２接続延長部と、を備えたバスバーと、を含む。 In order to achieve the above problems, the battery module according to the present invention is
Multiple cylindrical battery cells with electrode terminals formed at the top and bottom, respectively, arranged horizontally,
A module housing provided with a housing for inserting and accommodating the plurality of cylindrical battery cells.
It is configured to be in contact with the electrode terminals of the plurality of cylindrical battery cells to electrically connect the plurality of cylindrical battery cells to each other, and is located at the upper or lower portion of the plurality of cylindrical battery cells in the horizontal direction. A main body having a flat plate shape and having at least one connection opening drilled in the plate shape in the vertical direction and extending in different horizontal directions from the inner edge of the connection opening. Includes a bus bar comprising a first connection extension and a second connection extension, the ends of which are electrically connected and fixed to any one of the plurality of cylindrical battery cells.

また、前記第１接続延長部及び前記第２接続延長部の少なくとも一方が、少なくとも１回以上水平方向へ折り曲げられた折曲構造を含み得る。 Further, at least one of the first connection extension portion and the second connection extension portion may include a bent structure that is bent in the horizontal direction at least once.

さらに、前記第１接続延長部及び前記第２接続延長部の少なくとも一方が、少なくとも１回以上水平方向へ曲げられた曲線構造を含み得る。 Further, at least one of the first connection extension and the second connection extension may include a curved structure that is bent horizontally at least once.

そして、前記第１接続延長部及び前記第２接続延長部の少なくとも一方には、前記電極端子の連結固定された端部の下面がバッテリーモジュールの中心を基準にして外側方向へ凹み、凹んだ下面が前記電極端子の上に載置されるように構成された端子載置構造が形成され得る。 Then, on at least one of the first connection extension portion and the second connection extension portion, the lower surface of the end portion where the electrode terminals are connected and fixed is recessed outward with respect to the center of the battery module, and the recessed lower surface is formed. A terminal mounting structure may be formed in which the electrode is mounted on the electrode terminal.

また、前記第１接続延長部及び前記第２接続延長部の少なくとも一方には、前記電極端子に接続した端部がバッテリーモジュールを基準にして外側方向へ折り曲げられて段差を有し、前記電極端子の上に載置されるように構成された段差構造が形成され得る。 Further, at least one of the first connection extension portion and the second connection extension portion has an end portion connected to the electrode terminal bent outward with respect to the battery module to have a step, and the electrode terminal has a step. A stepped structure configured to be placed on top of it can be formed.

また、第１接続延長部及び前記第２接続延長部の少なくとも一つ以上には、前記接続開口の縁部と接続した部位の幅が細くなるように湾入した凹み構造が形成され得る。 Further, at least one of the first connection extension portion and the second connection extension portion may be formed with a recessed structure in which the width of the portion connected to the edge portion of the connection opening is narrowed.

そして、前記第１接続延長部及び前記第２接続延長部には、前記電極端子が位置する方向へ突出した突起が形成され得る。 Then, the first connection extension portion and the second connection extension portion may be formed with protrusions protruding in the direction in which the electrode terminals are located.

また、前記第１接続延長部及び前記第２接続延長部の前記突起の上部には、溶接棒が挿入される挿入溝が形成され得る。 Further, an insertion groove into which the welding rod is inserted may be formed in the upper part of the protrusion of the first connection extension portion and the second connection extension portion.

さらに、前記バスバーは、銅または銅合金からなり得る。 Further, the busbar may be made of copper or a copper alloy.

また、上記の課題を達成するための本発明によるバッテリーパック、前記バッテリーモジュールを少なくとも二つ以上含み得る。 Further, at least two or more battery packs and battery modules according to the present invention for achieving the above problems may be included.

また、上記の課題を達成するための本発明によるデバイスは、前記バッテリーパックを含み得る。 Further, the device according to the present invention for achieving the above-mentioned problems may include the battery pack.

本発明の一面によれば、本発明のバッテリーモジュールは、第１接続延長部及び第２接続延長部をバスバーの接続開口の内側縁部から相異なる水平方向へ突出して延びて形成することで、抵抗溶接を用いて電極端子と第１接続延長部及び第２接続延長部の端部とを接続固定する場合、電極端子と第１接続延長部及び第２接続延長部の端部との間に流れる電流量を増加させることができることから、抵抗溶接の効率性及び接合信頼度を向上させることができる。 According to one aspect of the present invention, the battery module of the present invention is formed by extending the first connection extension portion and the second connection extension portion from the inner edge portion of the connection opening of the bus bar in different horizontal directions. When connecting and fixing the electrode terminal to the ends of the first connection extension and the second connection extension using resistance welding, between the electrode terminal and the ends of the first connection extension and the second connection extension. Since the amount of flowing current can be increased, the efficiency of resistance welding and the reliability of joining can be improved.

また、本発明の他の実施例の一面によれば、バスバーの第１接続延長部及び第２接続延長部の接続開口の縁部と接続した部位の幅を、残りの部位よりも狭く形成する場合、細くなった幅部位における電気抵抗を高めることができ、電極端子と第１接続延長部及び第２接続延長部の端部との間に流れる電流量をより増加させることができるため、抵抗溶接の効率性及び接合信頼度を向上させることができる。 Further, according to one aspect of another embodiment of the present invention, the width of the portion connected to the edge portion of the connection opening of the first connection extension portion and the second connection extension portion of the bus bar is formed to be narrower than the remaining portion. In this case, the electric resistance in the narrowed width portion can be increased, and the amount of current flowing between the electrode terminal and the ends of the first connection extension portion and the second connection extension portion can be further increased, so that the resistance can be increased. Welding efficiency and joining reliability can be improved.

さらに、本発明の一面によれば、第１接続延長部及び第２接続延長部のいずれか一つ以上が、少なくとも一回以上折り曲げられた折曲構造を有する場合、接続開口の内側縁部から第１接続延長部及び第２接続延長部の各々の端部までの長さをより延長することができるため、電流の経路をより長く設定することができる。 Further, according to one aspect of the present invention, when any one or more of the first connection extension portion and the second connection extension portion has a bent structure that is bent at least once, from the inner edge portion of the connection opening. Since the length to each end of the first connection extension portion and the second connection extension portion can be further extended, the current path can be set longer.

そして、本発明の一面によれば、本発明のバスバーに少なくとも一回以上曲げられた曲線構造を有した第１接続延長部及び第２接続延長部を形成することで、接続開口の内側縁部から第１接続延長部及び第２接続延長部の各々の端部までの長さをより延長することができるため、電流の経路をより長く設定することができる。 Then, according to one aspect of the present invention, the inner edge portion of the connection opening is formed by forming the first connection extension portion and the second connection extension portion having a curved structure bent at least once in the bus bar of the present invention. Since the length from to the end of each of the first connection extension portion and the second connection extension portion can be further extended, the current path can be set longer.

また、本発明の一面によれば、バスバーの第１接続延長部及び第２接続延長部の少なくとも一方に端子載置構造を形成することで、第１接続延長部及び第２接続延長部と電極端子との電流の抵抗を減らすと共に、第１接続延長部及び第２接続延長部を電極端子の上に容易に位置させることができるため、製造効率をより向上させることができる。 Further, according to one aspect of the present invention, by forming a terminal mounting structure on at least one of the first connection extension portion and the second connection extension portion of the bus bar, the first connection extension portion and the second connection extension portion and the electrodes are formed. Since the resistance of the current with the terminal can be reduced and the first connection extension portion and the second connection extension portion can be easily positioned on the electrode terminals, the manufacturing efficiency can be further improved.

本明細書に添付される次の図面は、本発明の望ましい実施例を例示するものであり、発明の詳細な説明とともに本発明の技術的な思想をさらに理解させる役割をするため、本発明は図面に記載された事項だけに限定されて解釈されてはならない。 The following drawings, which are attached to the present specification, illustrate desirable embodiments of the present invention and serve to further understand the technical idea of the present invention as well as a detailed description of the present invention. It should not be construed as being limited to the matters described in the drawings.

本発明の一実施例によるバッテリーモジュールを概略的に示す斜視図である。It is a perspective view schematically showing the battery module according to one Embodiment of this invention. 本発明の一実施例によるバッテリーモジュールを概略的に示す分解斜視図である。It is an exploded perspective view schematically showing the battery module according to one Embodiment of this invention. 図１のバッテリーモジュールのＡ´領域の一部を概略的に示す部分平面図である。FIG. 3 is a partial plan view schematically showing a part of the A'region of the battery module of FIG. 1. 本発明の他の実施例によるバッテリーモジュールの一部を概略的に示す部分平面図である。It is a partial plan view schematically showing a part of the battery module according to another embodiment of this invention. 本発明のさらに他の実施例によるバッテリーモジュールの一部を概略的に示す部分平面図である。FIG. 3 is a partial plan view schematically showing a part of a battery module according to still another embodiment of the present invention. 本発明のさらに他の実施例によるバッテリーモジュールの一部を概略的に示す部分平面図である。FIG. 3 is a partial plan view schematically showing a part of a battery module according to still another embodiment of the present invention. 図３のバッテリーモジュールの線Ｃ－Ｃ´に沿って見た側面の一部を概略的に示す部分側断面図である。It is a partial side sectional view schematically showing a part of the side surface seen along the line CC'of the battery module of FIG. 本発明の他の実施例によるバッテリーモジュールを切断した側面の一部を概略的に示す部分側断面図である。It is a partial side sectional view schematically showing a part of the side surface which cut the battery module by another embodiment of this invention. 本発明のさらに他の実施例によるバッテリーモジュールを切断した側面の一部を概略的に示す部分側断面図である。It is a partial side sectional view schematically showing a part of the side surface which cut the battery module by still another Embodiment of this invention. 本発明の一実施例によるバッテリーパックを概略的に示す斜視図である。It is a perspective view schematically showing the battery pack according to one Embodiment of this invention. 本発明の一実施例によるバッテリーパックの一部構成を概略的に示す斜視図である。It is a perspective view which shows the partial structure of the battery pack by one Embodiment of this invention schematically.

以下、添付された図面を参照して本発明の望ましい実施例を詳しく説明する。これに先立ち、本明細書及び請求範囲に使われた用語や単語は通常的や辞書的な意味に限定して解釈されてはならず、発明者自らは発明を最善の方法で説明するために用語の概念を適切に定義できるという原則に則して本発明の技術的な思想に応ずる意味及び概念で解釈されねばならない。 Hereinafter, desirable embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used herein and in the scope of the claims should not be construed in a general or lexical sense only, and the inventor himself should explain the invention in the best possible way. It must be interpreted in the meaning and concept corresponding to the technical idea of the present invention in accordance with the principle that the concept of terms can be properly defined.

したがって、本明細書に記載された実施例及び図面に示された構成は、本発明のもっとも望ましい一実施例に過ぎず、本発明の技術的な思想のすべてを代弁するものではないため、本出願の時点においてこれらに代替できる多様な均等物及び変形例があり得ることを理解せねばならない。 Accordingly, the embodiments described herein and the configurations shown in the drawings are merely the most desirable embodiments of the invention and do not represent all of the technical ideas of the invention. It must be understood that at the time of filing, there may be a variety of equivalents and variants that can replace them.

図１は、本発明の一実施例によるバッテリーモジュールを概略的に示す斜視図である。そして、図２は、本発明の一実施例によるバッテリーモジュールを概略的に示す分離斜視図である。 FIG. 1 is a perspective view schematically showing a battery module according to an embodiment of the present invention. FIG. 2 is a separated perspective view schematically showing the battery module according to the embodiment of the present invention.

図１及び図２を参照すれば、本発明のバッテリーモジュール２００は、円筒型電池セル１００、モジュールハウジング２１０及び二つのバスバー２３０、２４０を含み得る。 Referring to FIGS. 1 and 2, the battery module 200 of the present invention may include a cylindrical battery cell 100, a module housing 210 and two bus bars 230, 240.

ここで、前記円筒型電池セル１００は、円筒状電池缶１２０及び円筒状電池缶１２０の内部に収容された電極組立体（図示せず）を含み得る。 Here, the cylindrical battery cell 100 may include a cylindrical battery can 120 and an electrode assembly (not shown) housed inside the cylindrical battery can 120.

また、円筒状電池缶１２０は、電気伝導性の高い材質からなり、例えば、円筒状電池缶１２０は、アルミニウムまたは銅であり得る。 Further, the cylindrical battery can 120 is made of a material having high electrical conductivity, and for example, the cylindrical battery can 120 may be aluminum or copper.

さらに、円筒状電池缶１２０が上下方向へ長く立てられて構成され得る。そして、円筒状電池缶１２０は、上下方向へ延びた円筒状であり得る。さらに、円筒状電池缶１２０の上部及び下部の各々に電極端子１１０が形成され得る。具体的に、円筒状電池缶１２０の上端の扁平な円形の上面には正極端子１１１が形成され得、円筒状電池缶１２０の下端の扁平な円形の下面には負極端子１１２が形成され得る。 Further, the cylindrical battery can 120 may be configured to be elongated in the vertical direction. The cylindrical battery can 120 may have a cylindrical shape extending in the vertical direction. Further, electrode terminals 110 may be formed on each of the upper part and the lower part of the cylindrical battery can 120. Specifically, the positive electrode terminal 111 may be formed on the flat circular upper surface of the upper end of the cylindrical battery can 120, and the negative electrode terminal 112 may be formed on the flat circular lower surface of the lower end of the cylindrical battery can 120.

さらに、前記円筒型電池セル１００は、水平方向へ複数の列及び行に配置され得る。ここで、水平方向とは、円筒型電池セル１００を地面においたとき、地面に平行な方向を意味し、上下方向に垂直な平面上の少なくとも一方向とも言える。また、水平方向とは、図１のＸ及びＹ方向である。 Further, the cylindrical battery cell 100 may be arranged horizontally in a plurality of columns and rows. Here, the horizontal direction means a direction parallel to the ground when the cylindrical battery cell 100 is placed on the ground, and can be said to be at least one direction on a plane perpendicular to the vertical direction. The horizontal direction is the X and Y directions in FIG.

例えば、図２に示したように、前記バッテリーモジュール２００は、前後方向（図２のＷ方向）の４個の列及び左右方向（Ｖ方向）の７行または６行に配置された複数の円筒型電池セル１００を備えている。 For example, as shown in FIG. 2, the battery module 200 has four columns in the front-rear direction (W direction in FIG. 2) and a plurality of cylinders arranged in seven or six rows in the left-right direction (V direction). The type battery cell 100 is provided.

また、電極組立体（図示せず）は、正極と負極との間に分離膜を挟んだ状態でゼリーロール型に巻き取られた構造で形成され得る。前記正極（図示せず）には、正極タブが付着され、円筒状電池缶１２０の上端の正極端子１１１に接続し得る。前記負極（図示せず）には、負極タブが付着され、円筒状電池缶１２０の下端の負極端子１１２に接続し得る。 Further, the electrode assembly (not shown) can be formed with a structure wound in a jelly roll type with a separation membrane sandwiched between the positive electrode and the negative electrode. A positive electrode tab is attached to the positive electrode (not shown) and can be connected to the positive electrode terminal 111 at the upper end of the cylindrical battery can 120. A negative electrode tab is attached to the negative electrode (not shown) and can be connected to the negative electrode terminal 112 at the lower end of the cylindrical battery can 120.

一方、前記モジュールハウジング２１０には、前記円筒型電池セル１００を内部に挿入して収容可能な収容部２１２Ａ、２１２Ｂが備えられ得る。具体的に、前記収容部２１２Ａ、２１２Ｂは、前記円筒型電池セル１００の外側面を囲むように形成された中空構造が複数個形成され得る。ここで、前記モジュールハウジング２１０は、電気絶縁素材を備え得る。例えば、前記電気絶縁素材は、プラスチック素材であり得る。より具体的に、前記プラスチック素材は、ポリ塩化ビニル（ＰＶＣ）であり得る。 On the other hand, the module housing 210 may be provided with accommodating portions 212A and 212B capable of inserting and accommodating the cylindrical battery cell 100 inside. Specifically, the accommodating portions 212A and 212B may have a plurality of hollow structures formed so as to surround the outer surface of the cylindrical battery cell 100. Here, the module housing 210 may include an electrically insulating material. For example, the electrically insulating material can be a plastic material. More specifically, the plastic material can be polyvinyl chloride (PVC).

また、前記モジュールハウジング２１０は、内部空間を形成するようになっており、前、後、左、右の方向に形成された第１外側壁２１０ａ、第２外側壁２１０ｂ、第３外側壁２１０ｃ及び第４外側壁２１０ｄを備え得る。 Further, the module housing 210 forms an internal space, and the first outer wall 210a, the second outer wall 210b, the third outer wall 210c, and the first outer wall 210a, the second outer wall 210b, and the third outer wall 210c formed in the front, rear, left, and right directions are formed. A fourth outer wall 210d may be provided.

そして、前記モジュールハウジング２１０の第１外側壁２１０ａ、第２外側壁２１０ｂ、第３外側壁２１０ｃ及び第４外側壁２１０ｄの少なくとも一つ以上には、他の一つのバッテリーモジュール２００の配置位置をガイドするための結合突起２６１、２６２及びガイド溝２６６、２６７が形成され得る。 Then, at least one of the first outer wall 210a, the second outer wall 210b, the third outer wall 210c, and the fourth outer wall 210d of the module housing 210 guides the arrangement position of the other battery module 200. Bonding projections 261 and 262 and guide grooves 266 and 267 can be formed.

例えば、図１に示したように、前記モジュールハウジング２１０の第１外側壁２１０ａ及び第２外側壁２１０ｂの各々には、二つの結合突起２６１、２６２及び二つのガイド溝２６６、２６７が形成され得る。 For example, as shown in FIG. 1, two coupling projections 261 and 262 and two guide grooves 266 and 267 may be formed on each of the first outer wall 210a and the second outer wall 210b of the module housing 210. ..

したがって、本発明のこのような構成によれば、本発明のモジュールハウジング２１０の結合突起２６１、２６２が、他の一つのモジュールハウジング２１０の第２外側壁２１０ｂに形成されたガイド溝２６６、２６７に挿入されて締結固定されるので、一つのバッテリーモジュール２００に接続した他のバッテリーモジュール２０１（図１０）を容易に配置できるだけでなく、相互分離されにくく固定することができる。 Therefore, according to such a configuration of the present invention, the coupling projections 261 and 262 of the module housing 210 of the present invention are formed in the guide grooves 266 and 267 formed in the second outer wall 210b of the other module housing 210. Since it is inserted and fastened and fixed, not only can the other battery modules 201 (FIG. 10) connected to one battery module 200 be easily arranged, but also they can be fixed without being separated from each other.

また、図１及び図２を参照すれば、前記上部ケース２１０Ａは、第１突出締結部２７１を備え得、前記下部ケース２１０Ｂは、第２突出締結部２７６を備え得る。 Further, referring to FIGS. 1 and 2, the upper case 210A may include a first protruding fastening portion 271, and the lower case 210B may include a second protruding fastening portion 276.

具体的に、第１突出締結部２７１は、Ｆ方向から見たとき、前記上部ケース２１０Ａの第２外側壁２１０ｂの外面から後方へ突出して延びて形成され得る。また、第２突出締結部２７６は、Ｆ方向から見たとき、前記下部ケース２１０Ｂの第１外側壁２１０ａの外面で前方へ突出して延びて形成され得る。 Specifically, the first projecting fastening portion 271 may be formed so as to project rearward from the outer surface of the second outer wall 210b of the upper case 210A when viewed from the F direction. Further, the second protruding fastening portion 276 may be formed so as to project forward and extend on the outer surface of the first outer wall 210a of the lower case 210B when viewed from the F direction.

ここで、前、後、左、右、上、下のように方向を示す用語は、観測者の位置や対象が置かれた形態によって変わり得る。但し、本明細書においては、説明の便宜のために、Ｆ方向から見たときを基準にして、前、後、左、右、上、下などの方向を区分して示す。 Here, terms indicating directions such as front, back, left, right, top, and bottom can change depending on the position of the observer and the form in which the object is placed. However, in the present specification, for convenience of explanation, the directions such as front, rear, left, right, up, and down are shown separately with reference to the view from the F direction.

そして、前記第１突出締結部２７１及び前記第２突出締結部２７６には、締結ボルト２７９（図１０）が挿入されるように貫通孔２７２が形成され得る。例えば、図１に示したように、前記モジュールハウジング２１０の前記第１突出締結部２７１は、他のバッテリーモジュール２０１（図１０）の第２突出締結部２７６と締結ボルト２７９によって結合し得る。 Then, a through hole 272 may be formed in the first protruding fastening portion 271 and the second protruding fastening portion 276 so that the fastening bolt 279 (FIG. 10) is inserted. For example, as shown in FIG. 1, the first protruding fastening portion 271 of the module housing 210 may be coupled to the second protruding fastening portion 276 of another battery module 201 (FIG. 10) by a fastening bolt 279.

ここで、前記第２突出締結部２７６の貫通孔２７２は、締結ボルト２７９が連続的に挿入されるように他のバッテリーモジュール２００の上部ケース２１０Ａの第１突出締結部２７１の貫通孔２７３と連通し得る。これによって、一つのバッテリーモジュール２００及び他の一つのバッテリーモジュール２０１（図１０）は、前記締結ボルト２７９によって第１突出締結部２７１と第２突出締結部２７６とが相互締結されながらバッテリーモジュール２００、２０１、２０２、２０３（図１０）が配列される。 Here, the through hole 272 of the second protruding fastening portion 276 communicates with the through hole 273 of the first protruding fastening portion 271 of the upper case 210A of the other battery module 200 so that the fastening bolt 279 is continuously inserted. Can be done. As a result, in the battery module 200 and the other battery module 201 (FIG. 10), the battery module 200, while the first protruding fastening portion 271 and the second protruding fastening portion 276 are mutually fastened by the fastening bolt 279. 201, 202, 203 (FIG. 10) are arranged.

したがって、本発明のこのような構成によれば、上部ケース２１０Ａの第１突出締結部２７１は、他のバッテリーモジュール２００の下部ケース２１０Ｂの第２突出締結部２７６とボルト結合することで、バッテリーモジュール２００の配置構造が崩れることを防止し、特に、上部に位置したバスバー２３０と下部に位置したバスバー２４０との電気的接続が切れることを防止することができる。 Therefore, according to such a configuration of the present invention, the first protruding fastening portion 271 of the upper case 210A is bolted to the second protruding fastening portion 276 of the lower case 210B of the other battery module 200, whereby the battery module is connected. It is possible to prevent the arrangement structure of the 200 from collapsing, and in particular, to prevent the electrical connection between the bus bar 230 located at the upper part and the bus bar 240 located at the lower part from being cut off.

一方、前記モジュールハウジング２１０は、上部ケース２１０Ａ及び下部ケース２１０Ｂを含み得る。 On the other hand, the module housing 210 may include an upper case 210A and a lower case 210B.

図３は、図１のバッテリーモジュールのＡ´領域の一部を概略的に示す部分平面図である。 FIG. 3 is a partial plan view schematically showing a part of the A'region of the battery module of FIG.

図２と共に図３を参照すれば、前記バスバー２３０は、一面が前記複数の円筒型電池セル１００の少なくとも二つ以上の円筒型電池セル１００の電極端子１１０と接触して電気的に接続し得る。即ち、前記バスバー２３０は、前記複数の円筒型電池セル１００の正極端子１１１または負極端子１１２と接触し、前記複数の円筒型電池セル１００同士を電気的に接続するように構成され得る。具体的に、前記バスバー２３０は、本体部２３１、第１接続延長部２３３及び第２接続延長部２３５を備え得る。 Referring to FIG. 3 together with FIG. 2, one side of the bus bar 230 may be in contact with and electrically connected to the electrode terminals 110 of at least two or more cylindrical battery cells 100 of the plurality of cylindrical battery cells 100. .. That is, the bus bar 230 may be configured to come into contact with the positive electrode terminal 111 or the negative electrode terminal 112 of the plurality of cylindrical battery cells 100 and electrically connect the plurality of cylindrical battery cells 100 to each other. Specifically, the bus bar 230 may include a main body portion 231, a first connection extension portion 233, and a second connection extension portion 235.

ここで、前記本体部２３１は、水平方向へ平行な形態のプレート形状を有し得る。言い換えれば、前記本体部２３１は、水平方向（ｘ方向、ｙ方向）の側面よりも相対的に広い上面及び下面を有するプレート形状を有し得る。また、前記本体部２３１は、正極端子１１１または負極端子１１２が形成された前記複数の円筒型電池セル１００の上部または下部に位置し得る。そして、前記本体部２３１は前記複数の円筒型電池セルを電気的に接続するように伝導性金属を含み得る。 Here, the main body portion 231 may have a plate shape in a form parallel to the horizontal direction. In other words, the main body portion 231 may have a plate shape having an upper surface and a lower surface relatively wider than the horizontal (x direction, y direction) side surface. Further, the main body portion 231 may be located at an upper portion or a lower portion of the plurality of cylindrical battery cells 100 in which the positive electrode terminal 111 or the negative electrode terminal 112 is formed. Then, the main body portion 231 may contain a conductive metal so as to electrically connect the plurality of cylindrical battery cells.

また、前記本体部２３１には、上下方向へ穿孔された少なくとも一つ以上の接続開口Ｈ１が形成され得る。さらに、前記第１接続延長部２３３及び前記第２接続延長部２３５は、前記接続開口Ｈ１の内側縁部２３１ａから相異なる水平方向（ｘ方向、ｙ方向）へ突出して延び得る。即ち、前記第１接続延長部２３３及び前記第２接続延長部２３５は、前記接続開口Ｈ１の内部に位置するように形成され得る。 Further, at least one connection opening H1 punched in the vertical direction may be formed in the main body portion 231. Further, the first connection extension portion 233 and the second connection extension portion 235 may project from the inner edge portion 231a of the connection opening H1 in different horizontal directions (x direction, y direction). That is, the first connection extension portion 233 and the second connection extension portion 235 may be formed so as to be located inside the connection opening H1.

即ち、前記バスバー２３０の接続開口Ｈ１の縁部は、前記第１接続延長部２３３及び前記第２接続延長部２３５の各々の他端部と接続しており、前記第１接続延長部２３３及び前記第２接続延長部２３５の残りの部位は、前記本体部２３１と電気的に絶縁可能に前記接続開口Ｈ１内に位置し得る。 That is, the edge portion of the connection opening H1 of the bus bar 230 is connected to the other ends of each of the first connection extension portion 233 and the second connection extension portion 235, and the first connection extension portion 233 and the said The remaining portion of the second connection extension portion 235 may be electrically isolated from the main body portion 231 and may be located in the connection opening H1.

そして、前記第１接続延長部２３３及び前記第２接続延長部２３５の突出した端部は、前記複数の円筒型電池セル１００のいずれか一つの電極端子１１０と電気的に接続して固定されるように形成され得る。 Then, the protruding ends of the first connection extension portion 233 and the second connection extension portion 235 are electrically connected and fixed to the electrode terminal 110 of any one of the plurality of cylindrical battery cells 100. Can be formed as such.

さらに、相異なる水平方向へ突出して延びた前記第１接続延長部２３３及び前記第２接続延長部２３５は、同じ方向に隣接して突出して延びた接続延長部（図示せず）と比較する場合、前記接続開口Ｈ１の内側縁部２３１ａに接続した各々の位置間の距離Ｐ１をより遠く設定することができる。 Further, when the first connection extension portion 233 and the second connection extension portion 235 extending in different horizontal directions are compared with the connection extension portion (not shown) extending adjacent to each other in the same direction. , The distance P1 between the positions connected to the inner edge portion 231a of the connection opening H1 can be set farther.

これによって、本発明のバスバー２３０は、電極端子１１０と溶接が必要な前記第１接続延長部２３３及び前記第２接続延長部２３５の端部に、抵抗溶接装置の溶接棒を接続する場合、従来技術のバスバーと比較して、前記第１接続延長部２３３と前記第２接続延長部２３５との間に流れる電流の経路をより長く設定することができる。このように電流の経路が長くなるほど、抵抗溶接に際し、前記接続開口Ｈ１の縁部に沿って前記第１接続延長部２３３と前記第２接続延長部２３５との間に流れる電流量を効果的に減少させることができる。 As a result, when the bus bar 230 of the present invention connects the welding rod of the resistance welding device to the ends of the first connection extension portion 233 and the second connection extension portion 235 that need to be welded to the electrode terminal 110, conventional methods are used. Compared to the bus bar of the technique, the path of the current flowing between the first connection extension 233 and the second connection extension 235 can be set longer. The longer the current path is, the more effectively the amount of current flowing between the first connection extension portion 233 and the second connection extension portion 235 along the edge portion of the connection opening H1 during resistance welding. Can be reduced.

したがって、本発明のこのような構成によれば、バスバー２３０の前記第１接続延長部２３３及び前記第２接続延長部２３５を前記接続開口Ｈ１の内側縁部２３１ａから相異なる水平方向へ突出延長して形成することで、抵抗溶接を用いて前記電極端子１１０と、前記第１接続延長部２３３及び前記第２接続延長部２３５の端部とを接続固定する場合、前記第１接続延長部２３３と前記第２接続延長部２３５との間に流れる電流量を効果的に減らすことができる。 Therefore, according to such a configuration of the present invention, the first connection extension portion 233 and the second connection extension portion 235 of the bus bar 230 are extended in different horizontal directions from the inner edge portion 231a of the connection opening H1. When the electrode terminal 110 and the end portions of the first connection extension portion 233 and the second connection extension portion 235 are connected and fixed by using resistance welding, the first connection extension portion 233 and the above-mentioned first connection extension portion 233 are formed. The amount of current flowing between the second connection extension portion 235 and the second connection extension portion 235 can be effectively reduced.

逆に、本発明は、前記電極端子１１０と、前記第１接続延長部２３３及び前記第２接続延長部２３５の端部との間に流れる電流量を増加させることができるため、抵抗溶接の効率性及び接合信頼度を向上させることができる。特に、本発明は、バスバーが既存のニッケル金属からなるバスバーに比べて電気抵抗が低い素材からなる場合、抵抗熱が高く発生しにくくなるので、その効果がさらに増大する。 On the contrary, the present invention can increase the amount of current flowing between the electrode terminal 110 and the ends of the first connection extension portion 233 and the second connection extension portion 235, and thus the efficiency of resistance welding. It is possible to improve the property and the reliability of joining. In particular, in the present invention, when the bus bar is made of a material having a lower electric resistance than the existing bus bar made of nickel metal, the resistance heat is high and it is difficult to generate the bus bar, so that the effect is further enhanced.

また、前記第１接続延長部２３３及び前記第２接続延長部２３５は、前記接続開口Ｈ１の内側縁部２３１ａの相互対応する両側部の各々から水平方向へ突出して延びて形成され得る。この際、前記第１接続延長部２３３と前記第２接続延長部２３５とは、相互直接的に接触することを避けるために所定の距離で離隔して位置し得る。 Further, the first connection extension portion 233 and the second connection extension portion 235 may be formed so as to project horizontally from each of the mutually corresponding side portions of the inner edge portion 231a of the connection opening H1. At this time, the first connection extension portion 233 and the second connection extension portion 235 may be separated from each other by a predetermined distance in order to avoid direct contact with each other.

例えば、図３に示したように、前記第１接続延長部２３３と前記第２接続延長部２３５とは、前記接続開口Ｈ１の内側縁部２３１ａにおける相互反対位置から突出して延びて形成され得る。このような場合、前記第１接続延長部２３３と前記第２接続延長部２３５との電流の経路を最も長く設定することができ、抵抗溶接の効率性及び接合信頼度を向上させることができる効果が極大化する。 For example, as shown in FIG. 3, the first connection extension portion 233 and the second connection extension portion 235 may be formed so as to project from opposite positions in the inner edge portion 231a of the connection opening H1. In such a case, the current path between the first connection extension portion 233 and the second connection extension portion 235 can be set to the longest, and the efficiency of resistance welding and the joining reliability can be improved. Is maximized.

図４は、本発明の他の実施例によるバッテリーモジュールの一部を概略的に示す部分平面図である。 FIG. 4 is a partial plan view schematically showing a part of the battery module according to another embodiment of the present invention.

図４を参照すれば、本発明の他の実施例によるバスバー２３０Ｂは、前記第１接続延長部２３３Ｂ及び前記第２接続延長部２３５Ｂの前記接続開口Ｈ１の縁部と接続した部位の幅Ｔが細くなるように湾入した凹み構造Ｂ１が形成され得る。具体的に、前記バスバー２３０Ｂは、前記第１接続延長部２３３Ｂ及び前記第２接続延長部２３５Ｂに凹み構造Ｂ１が共に形成され得る。 Referring to FIG. 4, in the bus bar 230B according to another embodiment of the present invention, the width T of the portion of the first connection extension portion 233B and the second connection extension portion 235B connected to the edge portion of the connection opening H1 A recessed structure B1 that is deepened so as to be thin can be formed. Specifically, in the bus bar 230B, the recessed structure B1 may be formed together in the first connection extension portion 233B and the second connection extension portion 235B.

例えば、図４に示したように、前記第１接続延長部２３３Ｂ及び前記第２接続延長部２３５Ｂの各々には、前記接続開口Ｈ１の縁部と接続した部位の幅Ｔが細くなるように湾入された凹み構造Ｂ１が形成され得る。 For example, as shown in FIG. 4, each of the first connection extension portion 233B and the second connection extension portion 235B has a bay so that the width T of the portion connected to the edge portion of the connection opening H1 becomes narrower. The inserted recessed structure B1 can be formed.

したがって、本発明のこのような構成によれば、前記第１接続延長部２３３Ｂ及び前記第２接続延長部２３５Ｂの前記接続開口Ｈ１の縁部と接続した部位の幅Ｔを残りの部位よりも狭く形成する場合、細くなった幅Ｔ部位の電気抵抗を高めることができ、前記電極端子１１０と、前記第１接続延長部２３３Ｂ及び前記第２接続延長部２３５Ｂの端部との間に流れる電流量をより増加させることができるため、抵抗溶接の効率性及び接合信頼度を向上させることができる。 Therefore, according to such a configuration of the present invention, the width T of the portion connected to the edge portion of the connection opening H1 of the first connection extension portion 233B and the second connection extension portion 235B is narrower than the remaining portion. When forming, the electric resistance of the narrowed width T portion can be increased, and the amount of current flowing between the electrode terminal 110 and the ends of the first connection extension portion 233B and the second connection extension portion 235B. Can be further increased, so that the efficiency of resistance welding and the reliability of joining can be improved.

図５は、本発明のさらに他の実施例によるバッテリーモジュールの一部を概略的に示す部分平面図である。 FIG. 5 is a partial plan view schematically showing a part of a battery module according to still another embodiment of the present invention.

図５を参照すれば、図５のバスバー２３０Ｃは、前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃの少なくとも一方が少なくとも１回以上水平方向へ折り曲げられた折曲構造Ｃ１を含み得る。具体的に、前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃの各々は、水平方向へ折り曲げられた折曲構造Ｃ１を有し得る。 Referring to FIG. 5, the bus bar 230C of FIG. 5 may include a bent structure C1 in which at least one of the first connection extension 233C and the second connection extension 235C is bent horizontally at least once. .. Specifically, each of the first connection extension 233C and the second connection extension 235C may have a horizontally bent bent structure C1.

例えば、図５に示したように、前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃの各々は、電極端子１１０が位置する方向へ１回垂直に折り曲げられた折曲構造Ｃ１を有し得る。 For example, as shown in FIG. 5, each of the first connection extension portion 233C and the second connection extension portion 235C has a bent structure C1 that is vertically bent once in the direction in which the electrode terminal 110 is located. Can be.

したがって、本発明のこのような構成によれば、本発明の少なくとも１回以上折り曲げられた折曲構造Ｃ１を有する前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃを形成することで、前記接続開口Ｈ１の内側縁部から前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃの各々の端部までの長さをより延長することができるため、電流の経路をより長く設定することができる。 Therefore, according to such a configuration of the present invention, by forming the first connection extension portion 233C and the second connection extension portion 235C having the bent structure C1 bent at least once of the present invention. Since the length from the inner edge of the connection opening H1 to the ends of the first connection extension 233C and the second connection extension 235C can be further extended, the current path is set longer. be able to.

また、前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃの各々の折曲構造Ｃ１の端部が前記電極端子１１０と接合する場合、バッテリーモジュール２００に加えられる外部衝撃による振動によって前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃにクラックが発生するか、破断する危険性を減らすことができる。 Further, when the end portions of the bent structures C1 of the first connection extension portion 233C and the second connection extension portion 235C are joined to the electrode terminal 110, the first connection extension portion 200 is vibrated by an external impact applied to the battery module 200. It is possible to reduce the risk of cracks or breakage in the 1 connection extension portion 233C and the second connection extension portion 235C.

これは、振動による応力や疲労が前記接続開口Ｈ１の縁部２３１ａの前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃの連結部位に集中するよりは、一次的に前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃの折曲構造Ｃ１で吸収されることで、前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃの耐久性をより向上させることができる。 This is because the stress and fatigue due to vibration are primarily concentrated in the connection portion of the first connection extension portion 233C and the second connection extension portion 235C of the edge portion 231a of the connection opening H1, but the first connection extension is performed temporarily. By being absorbed by the bent structure C1 of the portion 233C and the second connection extension portion 235C, the durability of the first connection extension portion 233C and the second connection extension portion 235C can be further improved.

図６は、本発明のさらに他の実施例によるバッテリーモジュールの一部を概略的に示す部分平面図である。 FIG. 6 is a partial plan view schematically showing a part of the battery module according to still another embodiment of the present invention.

図６を参考すれば、さらに他の実施例によるバスバー２３０Ｄは、前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄの少なくとも一方が少なくとも１回以上水平方向へ曲がった曲線構造Ｓを含み得る。具体的に、前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄの各々は、少なくとも１回以上水平方向へ曲がった曲線構造Ｓを含み得る。 Referring to FIG. 6, the bus bar 230D according to still another embodiment includes a curved structure S in which at least one of the first connection extension portion 233D and the second connection extension portion 235D is bent in the horizontal direction at least once. obtain. Specifically, each of the first connection extension 233D and the second connection extension 235D may include a curved structure S bent at least once in the horizontal direction.

例えば、図６に示したように、前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄの各々は、電極端子（正極端子１１１）が位置する方向へ一回水平方向へ曲がった曲線構造Ｓを有し得る。 For example, as shown in FIG. 6, each of the first connection extension portion 233D and the second connection extension portion 235D has a curved structure that is bent once in the horizontal direction in the direction in which the electrode terminal (positive electrode terminal 111) is located. May have S.

図５の前記第１接続延長部２３３Ｃ及び前記第２接続延長部２３５Ｃと同様に、図６の前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄは、一回以上曲がった曲線構造Ｓによって電流の経路を長く形成できる。 Similar to the first connection extension 233C and the second connection extension 235C of FIG. 5, the first connection extension 233D and the second connection extension 235D of FIG. 6 have a curved structure S that is bent once or more. Can form a long current path.

したがって、本発明のような構成によれば、本発明の少なくとも１回以上曲がった曲線構造Ｓを有する前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄを形成することで、接続開口の内側縁部から前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄの各々の端部までの長さをより延長することができるため、電流の経路をより長く設定することができる。 Therefore, according to the configuration as in the present invention, by forming the first connection extension portion 233D and the second connection extension portion 235D having the curved structure S bent at least once of the present invention, the connection opening can be formed. Since the length from the inner edge portion to each end of the first connection extension portion 233D and the second connection extension portion 235D can be further extended, the current path can be set longer.

また、前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄの曲線構造Ｓの端部が、前記電極端子１１０と接合する場合、バッテリーモジュール２００に加えられる外部衝撃による振動によって前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄにクラックが発生するか、破断する危険性を減らすことができる。 Further, when the end portion of the curved structure S of the first connection extension portion 233D and the second connection extension portion 235D is joined to the electrode terminal 110, the first connection is caused by vibration due to an external impact applied to the battery module 200. The risk of cracks or breaks in the extension 233D and the second connection extension 235D can be reduced.

これは、振動による応力や疲労が前記接続開口Ｈ１の縁部の前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄの連結部位に集中するよりは、一次的に前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄの曲線構造Ｓで吸収されることで、前記第１接続延長部２３３Ｄ及び前記第２接続延長部２３５Ｄの耐久性をより向上させることができる。 This is because the stress and fatigue due to vibration are primarily concentrated on the connection portions of the first connection extension portion 233D and the second connection extension portion 235D at the edge portion of the connection opening H1. By being absorbed by the curved structure S of the 233D and the second connection extension portion 235D, the durability of the first connection extension portion 233D and the second connection extension portion 235D can be further improved.

図７は、図３のバッテリーモジュールの線Ｃ－Ｃ´に沿って見た側面の一部を概略的に示す部分側断面図である。 FIG. 7 is a partial side sectional view schematically showing a part of a side surface seen along the line CC'of the battery module of FIG.

図２と共に図７を参照すれば、本発明の前記第１接続延長部２３３及び前記第２接続延長部（図示せず）の少なくとも一方は、端部の下面が前記電極端子１１０に連結固定され得る。そして、前記第１接続延長部２３３及び前記第２接続延長部の少なくとも一方の端部の下面が、バッテリーモジュール２００の中心を基準にして外側方向へ凹み得る。さらに、前記第１接続延長部２３３及び前記第２接続延長部の少なくとも一方は、前記端部の下面が前記電極端子１１０の上に載置されるように凹んだ端子載置構造Ｅ１を形成し得る。 Referring to FIG. 7 together with FIG. 2, at least one of the first connection extension portion 233 and the second connection extension portion (not shown) of the present invention has the lower surface of the end portion connected and fixed to the electrode terminal 110. obtain. Then, the lower surface of at least one end of the first connection extension portion 233 and the second connection extension portion may be recessed outward with respect to the center of the battery module 200. Further, at least one of the first connection extension portion 233 and the second connection extension portion forms a terminal mounting structure E1 recessed so that the lower surface of the end portion is mounted on the electrode terminal 110. obtain.

具体的に、前記第１接続延長部２３３及び前記第２接続延長部の両方には、前記電極端子１１０の外面と対応する形状に凹んだ端子載置構造Ｅ１が形成され得る。 Specifically, both the first connection extension portion 233 and the second connection extension portion may be formed with a terminal mounting structure E1 recessed in a shape corresponding to the outer surface of the electrode terminal 110.

例えば、図７に示したように、第１接続延長部２３３には、正極端子１１１の外面と対応する形状、即ち、平面視で曲線を有するように側壁Ｅ１ｓが形成され、上方へ凹んだ端子載置構造Ｅ１が形成され得る。これによって、第１接続延長部２３３は、正極端子１１１の上面及び側面に共に接するように位置させることができ、前記第１接続延長部２３３の端子載置構造Ｅ１が形成された内側端まで前記電極端子１１０を密着させることで、予め設定された正位置に第１接続延長部２３３を位置させることができる。 For example, as shown in FIG. 7, the first connection extension portion 233 is formed with side walls E1s having a shape corresponding to the outer surface of the positive electrode terminal 111, that is, having a curved line in a plan view, and is a terminal recessed upward. The mounting structure E1 can be formed. As a result, the first connection extension portion 233 can be positioned so as to be in contact with both the upper surface and the side surface of the positive electrode terminal 111, and the terminal mounting structure E1 of the first connection extension portion 233 is formed up to the inner end. By bringing the electrode terminals 110 into close contact with each other, the first connection extension portion 233 can be positioned at a preset normal position.

また、図７に示していないが、前記第２接続延長部には、前記第１接続延長部２３３と同様に端子載置構造Ｅ１が形成され得、前述した第１接続延長部２３３と同じ効果を奏し得る。 Further, although not shown in FIG. 7, the terminal mounting structure E1 can be formed in the second connection extension portion in the same manner as in the first connection extension portion 233, and has the same effect as the first connection extension portion 233 described above. Can be played.

したがって、本発明のこのような構成によれば、前記第１接続延長部２３３及び前記第２接続延長部の少なくとも一つ以上に端子載置構造Ｅ１を形成させることで、前記第１接続延長部２３３及び前記第２接続延長部と電極端子１１０との電流の抵抗を減少させることができるだけでなく、前記第１接続延長部２３３及び前記第２接続延長部を前記電極端子１１０に容易に位置させることができるため、製造効率をより向上させることができる。 Therefore, according to such a configuration of the present invention, the terminal mounting structure E1 is formed on at least one of the first connection extension portion 233 and the second connection extension portion, whereby the first connection extension portion is formed. Not only can the current resistance between the 233 and the second connection extension and the electrode terminal 110 be reduced, but the first connection extension 233 and the second connection extension can be easily positioned at the electrode terminal 110. Therefore, the manufacturing efficiency can be further improved.

図８は、本発明の他の実施例によるバッテリーモジュールを切断した側面の一部を概略的に示す部分側断面図である。 FIG. 8 is a partial side sectional view schematically showing a part of a side surface of a battery module according to another embodiment of the present invention.

図２と共に図８を参照すれば、本発明の前記第１接続延長部２３３Ｅ及び前記第２接続延長部（図示せず）の少なくとも一方は、前記電極端子１１０に接続した端部がバッテリーモジュール２００を基準にして外側方向（上方）へ折り曲げられて段差を有し得る。そして、前記第１接続延長部２３３Ｅ及び前記第２接続延長部の少なくとも一方には、前記電極端子１１０の上に載置されるように構成された段差構造Ｆ１が形成され得る。 Referring to FIG. 8 together with FIG. 2, at least one of the first connection extension portion 233E and the second connection extension portion (not shown) of the present invention has a battery module 200 at an end connected to the electrode terminal 110. Can be bent outward (upward) with reference to and have a step. Then, a stepped structure F1 configured to be placed on the electrode terminal 110 may be formed on at least one of the first connection extension portion 233E and the second connection extension portion.

具体的に、前記第１接続延長部２３３Ｅ及び前記第２接続延長部の両方は、前記電極端子１１０の外面と対応する形状で外側方向へ折り曲げられることによって段差構造Ｆ１が形成されることができる。 Specifically, both the first connection extension portion 233E and the second connection extension portion can be bent outward in a shape corresponding to the outer surface of the electrode terminal 110 to form a stepped structure F1. ..

例えば、図８に示したように、バスバー２３０Ｅの第１接続延長部２３３Ｅには、正極端子１１１の外面と対応する形状、即ち、平面視で曲線を有するように内側壁が形成され、上方へ段差を有する段差構造Ｆ１が形成され得る。これによって、第１接続延長部２３３Ｅは、正極端子１１１の上面及び側面に共に接するように位置でき、前記第１接続延長部２３３Ｅの段差構造Ｆ１が形成された内側端まで正極端子１１１を密着させることで、予め設定された正位置に第１接続延長部２３３Ｅを位置させることができる。 For example, as shown in FIG. 8, the first connection extension portion 233E of the bus bar 230E is formed with an inner side wall having a shape corresponding to the outer surface of the positive electrode terminal 111, that is, having a curved line in a plan view, and is upward. A step structure F1 having a step can be formed. As a result, the first connection extension portion 233E can be positioned so as to be in contact with both the upper surface and the side surface of the positive electrode terminal 111, and the positive electrode terminal 111 is brought into close contact with the inner end where the step structure F1 of the first connection extension portion 233E is formed. As a result, the first connection extension portion 233E can be positioned at a preset normal position.

また、図８に示していないが、第２接続延長部には、前記第１接続延長部２３３Ｅと同様に段差構造Ｆ１が形成され得、第１接続延長部２３３Ｅと同じ効果を有し得る。 Further, although not shown in FIG. 8, a stepped structure F1 may be formed in the second connection extension portion in the same manner as the first connection extension portion 233E, and may have the same effect as the first connection extension portion 233E.

したがって、本発明のこのような構成によれば、前記第１接続延長部２３３Ｅ及び前記第２接続延長部の少なくとも一方に端子載置構造Ｅ１を形成することで、前記第１接続延長部２３３Ｅ及び前記第２接続延長部と電極端子１１０との電流の抵抗を減少させることができるだけでなく、前記第１接続延長部２３３Ｅ及び前記第２接続延長部を、正極端子１１１の上に容易に位置させることができるため、製造効率をより向上させることができる。 Therefore, according to such a configuration of the present invention, by forming the terminal mounting structure E1 on at least one of the first connection extension portion 233E and the second connection extension portion, the first connection extension portion 233E and the first connection extension portion 233E and the second connection extension portion are formed. Not only can the current resistance between the second connection extension and the electrode terminal 110 be reduced, but the first connection extension 233E and the second connection extension can be easily positioned on the positive electrode terminal 111. Therefore, the manufacturing efficiency can be further improved.

図９は、本発明のさらに他の実施例によるバッテリーモジュールを切断した側面の一部を概略的に示す部分側断面図である。 FIG. 9 is a partial side sectional view schematically showing a part of a side surface of a cut battery module according to still another embodiment of the present invention.

図２と共に図９を参照すれば、バスバー２３０Ｆの前記第１接続延長部２３３及び前記第２接続延長部（図示せず）には、前記電極端子１１０が位置する方向へ突出した突起Ｇ１が形成され得る。 Referring to FIG. 9 together with FIG. 2, protrusion G1 protruding in the direction in which the electrode terminal 110 is located is formed on the first connection extension portion 233 and the second connection extension portion (not shown) of the bus bar 230F. Can be done.

また、前記第１接続延長部２３３及び前記第２接続延長部の各々は、電流が流れるように設定された溶接棒３００が接続するように構成され得る。具体的に、前記第１接続延長部２３３及び前記第２接続延長部の各々の突起Ｇ１が形成された一面の反対面には、円筒状の溶接棒３００が電気的接続をなすように接触領域Ｐが設定され得る。 Further, each of the first connection extension portion 233 and the second connection extension portion may be configured to be connected to a welding rod 300 set so that a current flows. Specifically, on the opposite surface of one surface on which the protrusions G1 of the first connection extension portion 233 and the second connection extension portion are formed, a contact region is formed so that the cylindrical welding rod 300 makes an electrical connection. P can be set.

また、前記第１接続延長部２３３及び前記第２接続延長部に形成された突起Ｇ１は、平面視で環形であり得る。また、前記突起Ｇ１は、環形の中心に近いほど正極端子１１１が形成された方向へ突出した長さがより長く形成され得る。 Further, the first connection extension portion 233 and the protrusion G1 formed on the second connection extension portion may be ring-shaped in a plan view. Further, the protrusion G1 may be formed to have a longer protrusion in the direction in which the positive electrode terminal 111 is formed as it is closer to the center of the ring shape.

そして、前記第１接続延長部２３３及び前記第２接続延長部には、前記溶接棒３００が電気的接続をなすように構成された接触領域Ｐが形成され得る。即ち、前記接触領域Ｐは、前記溶接棒３００が前記第１接続延長部２３３または前記第２接続延長部を加圧し接触する領域を意味する。 Then, a contact region P configured so that the welding rod 300 forms an electrical connection may be formed in the first connection extension portion 233 and the second connection extension portion. That is, the contact region P means a region where the welding rod 300 pressurizes and contacts the first connection extension portion 233 or the second connection extension portion.

例えば、前記接触領域Ｐが前記環形の突起Ｇ１の上部の周辺部に沿って形成される場合、前記接触領域Ｐと接触する前記溶接棒３００の下面は、円形を有し得る。 For example, when the contact region P is formed along the peripheral portion of the upper part of the ring-shaped protrusion G1, the lower surface of the welding rod 300 in contact with the contact region P may have a circular shape.

さらに、前記溶接棒３００は、下面が扁平な円から構成された円柱形状であり得る。この際、前記突起Ｇ１の環形の最外郭の直径は、前記溶接棒３００の円柱形状の直径よりも小さくてもよい。 Further, the welding rod 300 may have a cylindrical shape having a flat lower surface formed of a circle. At this time, the diameter of the outermost ring shape of the protrusion G1 may be smaller than the diameter of the cylindrical shape of the welding rod 300.

したがって、本発明のこのような構成によれば、前記バスバー２３０Ｆは、円柱形態の溶接棒３００が接触して加圧できるよう、前記環形の突起Ｇ１の上部面の周辺部に環形の接触領域Ｐを設定することで、前記溶接棒３００の加圧力が均一に前記突起Ｇ１に伝達され、前記溶接棒３００から前記突起Ｇ１に一定な電流密度で電流を流すことができる。これによって、本発明のバスバー２３０は、より高い接合力と信頼度で第１接続延長部２３３及び第２接続延長部と前記電極端子１１１との溶接をなすことができる。 Therefore, according to such a configuration of the present invention, the bus bar 230F has a ring-shaped contact region P around the peripheral portion of the upper surface of the ring-shaped protrusion G1 so that the columnar welding rod 300 can contact and pressurize. By setting, the pressing force of the welding rod 300 is uniformly transmitted to the projection G1, and a current can be passed from the welding rod 300 to the projection G1 at a constant current density. Thereby, the bus bar 230 of the present invention can weld the first connection extension portion 233 and the second connection extension portion to the electrode terminal 111 with higher bonding force and reliability.

さらに、前記第１接続延長部２３３及び前記第２接続延長部（図示せず）の各々の前記突起Ｇ１の上部には、溶接棒３００が挿入される挿入溝Ｈ２が形成され得る。 Further, an insertion groove H2 into which the welding rod 300 is inserted may be formed in the upper part of the protrusion G1 of each of the first connection extension portion 233 and the second connection extension portion (not shown).

また、前記挿入溝Ｈ２は、前記円柱形状の溶接棒３００の上下方向の下端部が挿入可能な大きさを有し得る。例えば、前記溶接棒３００の下端面が扁平な円柱形態を有する場合、前記挿入溝Ｈ２は、平面視で円形を有し得る。 Further, the insertion groove H2 may have a size in which the lower end portion of the cylindrical welding rod 300 in the vertical direction can be inserted. For example, when the lower end surface of the welding rod 300 has a flat cylindrical shape, the insertion groove H2 may have a circular shape in a plan view.

そして、前記挿入溝Ｈ２は、前記電極端子１１０が形成された方向へ所定の深さを有するように形成され得る。さらに、前記挿入溝Ｈ２の内面は、前記溶接棒３００の接触領域Ｐとして設定され得る。 Then, the insertion groove H2 may be formed so as to have a predetermined depth in the direction in which the electrode terminal 110 is formed. Further, the inner surface of the insertion groove H2 can be set as the contact region P of the welding rod 300.

したがって、本発明のこのような構成によれば、前記第１接続延長部２３３及び前記第２接続延長部の各々の突起Ｇ１の上部に前記溶接棒３００の下端部が挿入される挿入溝Ｈ２を形成することで、前記溶接棒３００の接触領域Ｐの面積を増やすことができるだけでなく、前記挿入溝Ｈ２の内面に沿って前記溶接棒３００の位置をガイドすることができるため、抵抗溶接がより容易になる。そして、前記溶接棒３００の加圧時に発生し得る前記溶接棒３００の接触領域Ｐからの離脱を防止することができる。 Therefore, according to such a configuration of the present invention, the insertion groove H2 into which the lower end portion of the welding rod 300 is inserted is provided in the upper portion of each protrusion G1 of the first connection extension portion 233 and the second connection extension portion. By forming the welding rod 300, not only the area of the contact region P of the welding rod 300 can be increased, but also the position of the welding rod 300 can be guided along the inner surface of the insertion groove H2, so that resistance welding becomes more effective. It will be easier. Then, it is possible to prevent the welding rod 300 from coming off from the contact region P, which may occur when the welding rod 300 is pressurized.

一方、前記バスバー２３０は、銅合金からなり得る。具体的に、前記銅合金は、前記バスバー２３０の全体重量の６０重量％以上の銅を含み得る。そして、前記銅合金は、亜鉛、クロム及びジルコニウムより選択された少なくとも一種以上を、銅の重量％を除いた残りの重量％で含み得る。しかし、前記バスバー２３０は銅合金のみに限定されることではなく、ニッケル、アルミニウム、金、銀などが主材料として構成された金属合金であれば、いずれも適用可能である。 On the other hand, the bus bar 230 may be made of a copper alloy. Specifically, the copper alloy may contain 60% by weight or more of the total weight of the bus bar 230. Then, the copper alloy may contain at least one selected from zinc, chromium and zirconium in the remaining weight% excluding the weight% of copper. However, the bus bar 230 is not limited to the copper alloy, and any metal alloy composed of nickel, aluminum, gold, silver or the like as a main material can be applied.

したがって、本発明によるバッテリーモジュール２００は、銅合金が備えられたバスバー２３０を使用する場合、ニッケル素材からなるバスバーと比べて高い伝導性を有し、電流損失を最小化して放熱性に優れており、素材コストを減らすことができるという利点がある。 Therefore, when the bus bar 230 provided with the copper alloy is used, the battery module 200 according to the present invention has higher conductivity than the bus bar made of a nickel material, minimizes current loss, and has excellent heat dissipation. , There is an advantage that the material cost can be reduced.

また、前記バスバー２３０の表面には、前記バスバー２３０よりも相対的に高い比抵抗の金属でめっき層を形成することができる。例えば、前記高い比抵抗の金属は、ニッケルであり得る。 Further, a plating layer can be formed on the surface of the bus bar 230 with a metal having a specific resistance relatively higher than that of the bus bar 230. For example, the metal having a high resistivity can be nickel.

図１０は、本発明の一実施例によるバッテリーパックを概略的に示す斜視図である。そして、図１１は、本発明の一実施例によるバッテリーパックの一部構成を概略的に示す斜視図である。 FIG. 10 is a perspective view schematically showing a battery pack according to an embodiment of the present invention. FIG. 11 is a perspective view schematically showing a partial configuration of the battery pack according to the embodiment of the present invention.

図２と共に図１０及び図１１を参照すれば、本発明によるバッテリーパック１０００は、前記バッテリーモジュール２００を少なくとも二つ以上含み得る。具体的に、前記少なくとも二つ以上のバッテリーモジュール２００、２０１、２０２、２０３は、一方向へ整列配置された構造であり得る。 Referring to FIGS. 10 and 11 together with FIG. 2, the battery pack 1000 according to the present invention may include at least two or more of the battery modules 200. Specifically, the at least two or more battery modules 200, 201, 202, 203 may have a structure aligned and arranged in one direction.

例えば、図１０に示したように、４個のバッテリーモジュール２００、２０１、２０２、２０３が前後方向へ整列配置され、４個のバッテリーモジュール２００、２０１、２０２、２０３は、第１バスバー２３０及び第２バスバー２４０によって相互電気的に直列接続し得る。また、前記第２バスバー２４０は、前述した図３に示した前記バッテリーモジュール２００の上部に位置したバスバー２３０の本体部２３１、接続開口Ｈ１、第１接続延長部２３３及び第２接続延長部２３５と類似または同じ構成を全て備え得る。 For example, as shown in FIG. 10, the four battery modules 200, 201, 202, 203 are arranged in the front-rear direction, and the four battery modules 200, 201, 202, 203 are the first bus bar 230 and the first bus bar 230. 2 Bus bars 240 may be electrically connected in series to each other. Further, the second bus bar 240 includes a main body portion 231 of the bus bar 230 located above the battery module 200 shown in FIG. 3, a connection opening H1, a first connection extension portion 233, and a second connection extension portion 235. It may have all similar or same configurations.

具体的に、前記第１バスバー２３０は、前記円筒型電池セル１００の上端に形成された正極端子１１１と電気的に接続し得る。そして、前記第２バスバー２４０は、前記円筒型電池セル１００の下端に形成された負極端子１１２と電気的に接続し得る。 Specifically, the first bus bar 230 may be electrically connected to a positive electrode terminal 111 formed at the upper end of the cylindrical battery cell 100. The second bus bar 240 can be electrically connected to the negative electrode terminal 112 formed at the lower end of the cylindrical battery cell 100.

さらに、前記第１バスバー２３０は、前記正極端子１１１と接触するように前記モジュールハウジング２１０の上部に載置され得る。そして、前記第２バスバー２４０は、前記負極端子１１２と接触するように前記モジュールハウジング２１０の下部に載置され得る。 Further, the first bus bar 230 may be placed on the upper part of the module housing 210 so as to be in contact with the positive electrode terminal 111. Then, the second bus bar 240 may be placed on the lower portion of the module housing 210 so as to be in contact with the negative electrode terminal 112.

また、前記第１バスバー２３０は、Ｆ方向から見たときを基準にして、本体部２３１の前端部に前記第２バスバー２４０の一部が接触するように形成された載置部２３７が備えられ得る。即ち、前記載置部２３７は、前記第２バスバー２４０の一部の下面と接触するように上面が備えられ得る。 Further, the first bus bar 230 is provided with a mounting portion 237 formed so that a part of the second bus bar 240 comes into contact with the front end portion of the main body portion 231 with reference to the view from the F direction. obtain. That is, the above-mentioned placement portion 237 may be provided with an upper surface so as to come into contact with the lower surface of a part of the second bus bar 240.

また、前記第２バスバー２４０は、折曲部２４４と、前記折曲部２４４に接続した連結部２４５と、を備え得る。具体的に、前記折曲部２４４は、前記第２バスバー２４０の本体部２４１の後端部から上方へ垂直に折り曲げられて延びた構造を有し得る。 Further, the second bus bar 240 may include a bent portion 244 and a connecting portion 245 connected to the bent portion 244. Specifically, the bent portion 244 may have a structure that is vertically bent and extended upward from the rear end portion of the main body portion 241 of the second bus bar 240.

さらに、前記連結部２４５は、前記折曲部２４４の上端から後方へ折り曲げられて延びた形態であり得る。また、前記連結部２４５は、前記第１バスバー２３０と電気的に接続するように前記第１バスバー２３０の載置部２３７の上面に載置されるように構成され得る。即ち、前記連結部２４５の下面は、前記第１バスバー２３０の載置部２３７の上面と接触するように構成され得る。 Further, the connecting portion 245 may be in a form of being bent rearward from the upper end of the bent portion 244 and extending. Further, the connecting portion 245 may be configured to be mounted on the upper surface of the mounting portion 237 of the first bus bar 230 so as to be electrically connected to the first bus bar 230. That is, the lower surface of the connecting portion 245 may be configured to be in contact with the upper surface of the mounting portion 237 of the first bus bar 230.

また、前記バッテリーモジュール２０２には、バスバー２３０Ｇと電気的に接続する外部入出力端子２８０が形成され得る。さらに、前記バッテリーモジュール２０２の第３バスバー２３０Ｇには、図１１に示した第１バスバー２３０と異なり、前記外部入出力端子２８０と電気的に接続するように、下方へ折り曲げられた下向き折曲部Ｅが形成され得る。 Further, the battery module 202 may be formed with an external input / output terminal 280 that is electrically connected to the bus bar 230G. Further, unlike the first bus bar 230 shown in FIG. 11, the third bus bar 230G of the battery module 202 has a downwardly bent portion that is bent downward so as to be electrically connected to the external input / output terminal 280. E can be formed.

したがって、本発明のこのような構成によれば、前記下向き折曲部Ｅが形成された第３バスバー２３０Ｇは、外部入出力端子２８０と電気的に接続をなすことができ、組立工程時間を短縮させることができるという利点がある。 Therefore, according to such a configuration of the present invention, the third bus bar 230G in which the downwardly bent portion E is formed can be electrically connected to the external input / output terminal 280, and the assembly process time is shortened. There is an advantage that it can be made to.

また、図１０を参照すれば、本発明によるバッテリーパック１０００は、このようなバッテリーモジュール２００に加え、バッテリーモジュール２００の充放電を制御するための各種装置、例えば、ＢＭＳ（Ｂａｔｔｅｒｙ Ｍａｎａｇｅｍｅｎｔ Ｓｙｓｔｅｍ）、電流センサー、ヒューズなどをさらに含み得る。 Further, referring to FIG. 10, in the battery pack 1000 according to the present invention, in addition to such a battery module 200, various devices for controlling charging / discharging of the battery module 200, for example, a BMS (Battery Management System), a current. It may further include sensors, fuses, etc.

また、本発明によるバッテリーパック１０００は、エネルギー貯蔵デバイスに適用されるか、電気自動車やハイブリッド自動車のような自動車に適用可能である。即ち、本発明による自動車は、前記バッテリーパック１０００を含み得る。 Also, the battery pack 1000 according to the present invention can be applied to energy storage devices or to automobiles such as electric vehicles and hybrid vehicles. That is, the automobile according to the present invention may include the battery pack 1000.

さらに、前記エネルギー貯蔵装置は、電力生産部で生産した電力を貯蔵し、電力網に供給するシステムであり得る。また、前記電力網は、商用電力網にしてもよく、小規模地域において自体電力網にしてもよい。さらに、場合によって、スマートグリッドで電力を貯蔵する電力貯蔵装置にすることができ、生産した電力を即時に消費する負荷または電力変換装置にすることも可能である。 Further, the energy storage device may be a system that stores the electric power produced by the electric power production unit and supplies it to the electric power grid. Further, the power grid may be a commercial power grid or may be a power grid itself in a small area. Further, in some cases, it can be a power storage device that stores electric power in a smart grid, and it can also be a load or a power conversion device that immediately consumes the produced electric power.

なお、本明細書において、上、下、左、右、前、後のような方向を示す用語が使用されたが、このような用語は相対的な位置を示し、説明の便宜のためのものであるだけで、対象となる事物の位置や観測者の位置などによって変わり得ることは、当業者にとって自明である。 In the present specification, terms indicating directions such as up, down, left, right, front, and back are used, but such terms indicate relative positions and are for convenience of explanation. It is obvious to those skilled in the art that it can change depending on the position of the object or the position of the observer.

以上のように、本発明を限定された実施例と図面によって説明したが、本発明はこれに限定されるものではなく、本発明の属する技術分野で通常の知識を持つ者によって本発明の技術思想と特許請求の範囲の均等範囲内で多様な修正及び変形が可能であることは言うまでもない。 As described above, the present invention has been described with respect to the limited examples and drawings, but the present invention is not limited thereto, and the technique of the present invention is developed by a person having ordinary knowledge in the technical field to which the present invention belongs. It goes without saying that various modifications and modifications are possible within the same range of ideas and claims.

本発明は、バスバーを備えたバッテリーモジュール及びバッテリーパックに関する。また、本発明は、前記バッテリーパックが備えられた電子デバイスまたは自動車関連産業に利用可能である。 The present invention relates to a battery module and a battery pack provided with a bus bar. The present invention can also be used in electronic devices equipped with the battery pack or in the automobile-related industry.

１００ 円筒型電池セル
１１１、１１２ 正極端子、負極端子
２００、２０１、２０２、２０３ バッテリーモジュール
２１０ モジュールハウジング
２３０、２４０ バスバー
２３１、２４１ 本体部
２３３ 第１接続延長部
２３５ 第２接続延長部
３００ 溶接棒
１０００ バッテリーパック
Ｂ１ 凹み構造
Ｃ１ 折曲構造
Ｅ１ 端子載置構造
Ｆ１ 段差構造
Ｇ１ 突起
Ｈ１ 接続開口
Ｈ２ 挿入溝
Ｓ 曲線構造 100 Cylindrical battery cell 111, 112 Positive electrode terminal, Negative electrode terminal 200, 201, 202, 203 Battery module 210 Module housing 230, 240 Bus bar 231 and 241 Main body 233 First connection extension 235 Second connection extension 300 Welding rod 1000 Battery pack B1 Recessed structure C1 Folded structure E1 Terminal mounting structure F1 Step structure G1 Protrusion H1 Connection opening H2 Insertion groove S Curved structure

Claims (9)

水平方向に配置された複数の円筒型電池セルであって、前記円筒型電池セルの上部及び下部に各々電極端子が形成された、複数の円筒型電池セルと、
前記複数の円筒型電池セルを収容する収容部が備えられたモジュールハウジングと、
前記複数の円筒型電池セルの電極端子と接触して前記複数の円筒型電池セル同士を電気的に接続するように構成されたバスバーであって、前記バスバーは、前記複数の円筒型電池セルの上部および／または下部に位置するとともに、水平方向へ扁平なプレート形状を有する本体部であって、プレート形状体に上下方向へ穿孔された少なくとも一つ以上の接続開口が形成された本体部と、前記接続開口の内側縁部から相異なる水平方向へ突出して延び、端部が前記複数の円筒型電池セルのうちいずれか一つの電極端子と電気的に接続固定された第１接続延長部及び第２接続延長部と、を備えるバスバーと、
を含み、
前記第１接続延長部及び前記第２接続延長部の少なくとも一つ以上には、前記接続開口の縁部と接続した部位の幅が細くなるように湾入した凹み構造が形成されていることを特徴とするバッテリーモジュール。 A plurality of cylindrical battery cells arranged in the horizontal direction, the plurality of cylindrical battery cells in which electrode terminals are formed at the upper and lower portions of the cylindrical battery cell, respectively.
A module housing provided with a housing for accommodating the plurality of cylindrical battery cells,
A bus bar configured to contact the electrode terminals of the plurality of cylindrical battery cells and electrically connect the plurality of cylindrical battery cells to each other, wherein the bus bar is a bus bar of the plurality of cylindrical battery cells. A body portion that is located at the top and / or bottom and has a horizontally flat plate shape, wherein the plate-shaped body is formed with at least one connection opening that is perforated in the vertical direction. A first connection extension and a first connection extension extending from the inner edge of the connection opening in different horizontal directions and having an end electrically connected and fixed to an electrode terminal of any one of the plurality of cylindrical battery cells. A busbar with two connection extensions,
Including
At least one of the first connection extension portion and the second connection extension portion is formed with a recessed structure in which the width of the portion connected to the edge portion of the connection opening is narrowed. Characterized battery module. 前記第１接続延長部及び前記第２接続延長部の少なくとも一方が、少なくとも１回以上水平方向へ折り曲げられた折曲構造を含むことを特徴とする請求項１に記載のバッテリーモジュール。 The battery module according to claim 1, wherein at least one of the first connection extension portion and the second connection extension portion includes a bent structure that is bent at least once in the horizontal direction. 前記第１接続延長部及び前記第２接続延長部の少なくとも一方が、少なくとも１回以上水平方向へ曲げられた曲線構造を含むことを特徴とする請求項１に記載のバッテリーモジュール。 The battery module according to claim 1, wherein at least one of the first connection extension portion and the second connection extension portion includes a curved structure that is bent in the horizontal direction at least once. 前記第１接続延長部及び前記第２接続延長部の少なくとも一方には、前記電極端子の連結固定された端部の下面がバッテリーモジュールの中心を基準にして外側方向へ凹み、凹んだ下面が前記電極端子の上に載置されるように構成された端子載置構造が形成されていることを特徴とする請求項１から３のいずれか一項に記載のバッテリーモジュール。 In at least one of the first connection extension portion and the second connection extension portion, the lower surface of the connected and fixed end portion of the electrode terminal is recessed outward with respect to the center of the battery module, and the recessed lower surface is the recessed lower surface. The battery module according to any one of claims 1 to 3, wherein a terminal mounting structure configured to be mounted on the electrode terminals is formed. 前記第１接続延長部及び前記第２接続延長部の少なくとも一方には、前記電極端子に接続した端部がバッテリーモジュールを基準にして外側方向へ折り曲げられて段差を有し、前記電極端子の上に載置されるように構成された段差構造が形成されていることを特徴とする請求項１から４のいずれか一項に記載のバッテリーモジュール。 At least one of the first connection extension portion and the second connection extension portion has an end portion connected to the electrode terminal bent outward with respect to the battery module to have a step, and is above the electrode terminal. The battery module according to any one of claims 1 to 4, wherein a stepped structure configured to be mounted on the battery module is formed. 前記第１接続延長部及び前記第２接続延長部には、前記電極端子が位置する方向へ突出した突起が形成され、
前記第１接続延長部及び前記第２接続延長部の前記突起の上部には、溶接棒が挿入される挿入溝が形成されていることを特徴とする請求項１から５のいずれか一項に記載のバッテリーモジュール。 The first connection extension portion and the second connection extension portion are formed with protrusions protruding in the direction in which the electrode terminals are located.
The invention according to any one of claims 1 to 5 , wherein an insertion groove into which a welding rod is inserted is formed in an upper portion of the first connection extension portion and the protrusion of the second connection extension portion. Described battery module. 前記バスバーは、銅または銅合金を含むことを特徴とする請求項１から６のいずれか一項に記載のバッテリーモジュール。 The battery module according to any one of claims 1 to 6 , wherein the bus bar contains copper or a copper alloy. 請求項１から７のいずれか一項に記載のバッテリーモジュールを少なくとも二つ以上含む、バッテリーパック。 A battery pack comprising at least two or more battery modules according to any one of claims 1 to 7 . 請求項８に記載のバッテリーパックを含む、デバイス。 A device comprising the battery pack according to claim 8 .
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